Orginally Meizu M3s would easily get a full charge in under an hour.
I few months ago I was having issues with the screen so I bought it back to the store I purchased it from, they them gave it back to me and the phone worked fine except it took 1 hour to charge to 10%, so I took it back and they replaced the battery and usb board, I problem presist but not as slow but still unbearable charging just 9% in half an hour. I took it back and they declined to get it repaired as they thought they had fixed it.

I'm not sure what to do know, is there any fix or anything I can say to the store.

Running on 6.2.0.0G have gone back to previous versions (6.1.0.0G and 5.1.5.3G)

Any help is appreciated, thanks.